Sync Obsidian Vault
You can use Fotosink to sync your Obsidian vault with a library. If you don't have an existing library, create one in Seafile.
Open Obsidian. Open Settings and go to the Community Plugins section
Search for the 'Remotely Save' plugin
Install and Enable the plugin
Go to the Remotely Save plugin settings
Choose Webdav
Set Server Address to https://files.fotosink.com/seafdav
Use the same email address and password you use for https://files.fotosink.com
Set Depth Header Sent to Servers to 'supports depth=infinity'
Set Remote Base Directory to the library in Seafile you want to sync with. Make sure the library exists.
Check Connectivity
You should see something like this
Set Sync Settings as you like
Enjoy!